The trouble is we are short of hands.A. whatB. thatC. howD. why

问题补充：

The trouble is we are short of hands.

A. what

B. that

C. how

D. why

答案：

A. what

(答案→)B. that

C. how

D. why

解析：表语从句考查题。句意为：问题是我们缺少帮助。That连接表语从句不做成分只起连接作用。